CV front end swap wheel offsets and backspacing

[72FordGunny]

I am just setting up a 1972 Ford F100 with crown Vic front end and a rear axle assembly. I have flipped the axle on the rear. I want to do a 20 inch wheel. 20x9.5 back and 20x8.5 in the front. I was wondering what I will need for offsets on the wheels?

[Aerocoupe]

Not sure what kind of mods Hackster made on his swap but I know he is running a 18x11 with a 7.125" BS on all four corners. He also has 14" brakes on his via an adapter bracket that allows the use of Mustang GT 500 14" rotors and C5 Vette calipers. I don't remember him modifying the inner fenders other than clearancing them for the CV UCA. He is using Rushforth wheels so they are custom built in 0.125" increments on back space. I am not if there was any massaging to get them to fit up front but he did mention rolling the rear fender lips so my guess is the fronts got rolled as well. His build thread is here:

http://www.fordification.com/forum/view ... &start=390

I am going to go with a 18x10's up front and mulling over the rears pending the four link install. Once that is done and the bed is back on the truck I can pick the wheels and narrow the 9" accordingly.